Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7020216 | Method for adjusting a phase angle of a phase modifier of a transmitting device A method for adjusting a phase angle (φ) of a phase modifier (25) of a transmitting device which includes a quadrature modulator (3), a power amplifier (9), a quadrature demodulator (19) and differential amplifiers (26, 27). The p... | 03/28/2006 |
| 7020070 | Selectively controlled modulation distortion of an IQ-baseband signal The frequency bandwidth of a signal is reduced, while retaining the desired signal information, by selectively introducing a controlled distortion to an IQ baseband signal. Selective generation of either a non-distorted complex-valued baseband signal or a distorted ... | 03/28/2006 |
| 7016697 | Controlling multiple modems in a wireless terminal using dynamically varying modem transmit power limits A mobile wireless terminal (MWT) includes multiple wireless modems. The multiple modems have their respective transmit outputs combined together to produce an aggregate transmit output. The multiple modems can concurrently transmit data in a reverse link direction a... | 03/21/2006 |
| 7016431 | Transmitter for transmitting signals over radio channels and method for transmitting signals over radio channels A transmitter for sending signals over wireless channels and a method of sending signals over wireless channels are described. The transmitter and the method are used to determine a transfer characteristic of an amplifier (8) in the transmitter. Test signals ... | 03/21/2006 |
| 7013114 | Impedence-matched transmitting device having high interference immunity According to the present invention, the resistance to interference of a transmitting device, which is particularly embodied as a high frequency transmitter with a transmitter amplifier may be improved, whereby a loss-affected network, for example, in the form of a m... | 03/14/2006 |
| 7013161 | Peak power reduction using windowing and filtering Large signal peaks (for example, peaks 105 and 110) can dramatically increase the cost of a communications device by requiring high grade power amplifiers. Peak reduction can reduce the large peaks at a cost of increasing spurious emissions. A circuit ... | 03/14/2006 |
| 7012968 | Apparatus for detecting and adjusting transmission power of CDMA system A transmission power detecting apparatus of a CDMA system is disclosed by which since the power detection of the RF CDMA signal is digitally performed and no RF device (an RSSI detector) which is sensitive to a temperature change is used, a power of the RF CDMA sign... | 03/14/2006 |
| 7010282 | Dynamic bias for RF power amplifiers A subscriber unit and method for wireless communication that dynamically adjusts RF amplifier operating bias for the subscriber unit's transmitter in response to a power control signal. The invention provides high-efficiency RF power amplification for applications w... | 03/07/2006 |
| 7010286 | Apparatus, system, and method for down-converting and up-converting electromagnetic signals Methods, systems, and apparatuses for down-converting and up-converting an electromagnetic signal. In embodiments, the invention operates by receiving an electromagnetic signal and recursively operating on approximate half cycles of a carrier signal. The recursive o... | 03/07/2006 |
| 7010280 | Linear RF power amplifier and transmitter A transmitter circuit means is arranged to provide linear amplification of non-constant envelope modulated RF signals by directly amplitude modulating the transmitter power amplifier with the amplitude component of the baseband signal. In addition, the signal to be ... | 03/07/2006 |
| 7010278 | Sideband suppression method and apparatus for quadrature modulator using magnitude measurements Systems and methods are described for a sideband suppression technique for quadrature modulation using magnitude measurements. Gain imbalance, phase imbalance, or both gain and phase imbalance are corrected in a quadrature modulator. Predetermined voltage levels are... | 03/07/2006 |
| 7010057 | Dual mode multi-slot EGPRS transmitter A method is disclosed to operate a dual mode multi-timeslot RF transmitter, as is an RF transmitter that include a control unit that operates in accordance with the method. The method includes, prior to a first timeslot, setting a plurality of control signals for th... | 03/07/2006 |
| 7006843 | Method and apparatus for regulating the power of a transmit amplifier A method and apparatus for controlling the power of a transmit amplifier wherein a portion of the power transmitted from the antenna is received by a coupling element and is converted via a radio-frequency detector to a DC voltage value which is used for power contr... | 02/28/2006 |
| 7006837 | Electronic apparatus An electronic (or computer) apparatus (10) has a current position data output unit (13) and an area data output unit (14) responsive to current position data from the current position data output unit for producing specific country data represen... | 02/28/2006 |
| 7006805 | Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service A receiver having multi-mode and multi-band functionality and capabilities is described herein. The receiver is capable of selectively operating over a plurality of bands and channels. The receiver operates in a plurality of modes, including but not limited to a sin... | 02/28/2006 |
| 7005941 | High-frequency coupler A high-frequency coupler for extracting a secondary signal representative of a main signal carried by a conductive line, including two series-coupled, respectively high-pass and low-pass, filters, and the input of which is intended to be connected to said line while... | 02/28/2006 |
| 7002417 | RC and SC filter compensation in a radio transceiver Disclosed is apparatus for operating with an RC filter (26, 26A), and a corresponding method. The apparatus includes circuitry (32) for use in measuring an actual value of at least one filter component and a controller (34), coupled to the measu... | 02/21/2006 |
| 7002407 | Delay mismatched feed forward amplifier system using penalties and floors for control A delay mismatched feed forward amplifier system employing a control system and method using floors and penalties is disclosed. The disclosed control system and method allows the second loop phase adjuster setting to be offset in a repeatable and controlled manner. ... | 02/21/2006 |
| 6999524 | Arrangement for controlling the output power of an HF transmitter The invention relates to an arrangement for controlling the output power of a high-frequency transmitter. The control power of the transmitter output stage is controlled according to a correcting variable (R) and by means of an actuator, whereby said variable is obt... | 02/14/2006 |
| 6999738 | Device and method for pre-treating a signal to be transmitted using a non-linear amplifier with an upstream band-pass filter A device for pretreating a signal to be transmitted over a transmission path, wherein the transmission path comprises a band-pass filter whose pass-band width is smaller than a predetermined bandwidth and a non-linear amplifier, includes a linearization means for pe... | 02/14/2006 |
| 6999737 | Wireless transmitter and device for mobile station A wireless transmitter has: a calculation means for determining an electric power value of baseband signals to be input to modulating means; a detection means for determining a transmitting electric power value after detecting a transmitting electric power of an ant... | 02/14/2006 |
| 6999545 | Method and system for undersampled symbol synchronization Described is a system and method for providing a synchronization pattern in a communication system. The method includes generating a synchronization pattern with good randomness properties; packing a signal for transmission with m headers, each header consisting of ... | 02/14/2006 |
| 6999528 | I/Q demodulator device with three power detectors and two A/D converters The present invention relates to a method and a device for the I/Q demodulation of modulated RF signals. The I/Q demodulator (60) has a first input for the RF signal (61) to be demodulated and a second input for a RF signal (62) originating from... | 02/14/2006 |
| 6999523 | Multi-frequency transmitter using predistortion and a method of transmitting A multi frequency carrier transmitter comprises input means for receiving a plurality of different digital signals to be transmitted. The different signals are to be transmitted on different carrier frequencies. Amplifier means receive a composite signal comprising ... | 02/14/2006 |
| 6999427 | CDMA reception apparatus and received signal power measuring apparatus in CDMA mobile communication system In a CDMA reception apparatus, averaging part for averaging at least one of vector, amplitude and power of received signal of a plurality of transmit power control sections is provided. Further, propagation path variation estimator for estimating a propagation path ... | 02/14/2006 |
| 6999012 | Temperature compensation device for automatic gain control loop A temperature compensation device for an automatic gain control loop in a receiver of a mobile communication terminal is disclosed. The temperature compensation device comprises a thermistor having a resistance varying with temperature to vary its output voltage, an... | 02/14/2006 |
| 6998916 | Feed forward amplifier system using penalties and floors for optimal control A feed forward amplifier employing a new adaptive controller and method is disclosed. The controller aligns both a gain adjuster and phase adjuster of a first cancellation loop. The phase adjuster may be controlled following a standard approach. However, the gain ad... | 02/14/2006 |
| 6998909 | Method to compensate for memory effect in lookup table based digital predistorters Methods and apparatus are provided for nonlinear compensation of a supposedly linear behaving semiconductor device (e.g., power amplifier). A measure corresponding to the temperature of the silicon in the semiconductor device can be derived from both current and pre... | 02/14/2006 |
| 6996378 | Transmitter A transmitter for a plurality of carriers of a broad-band transmitting spectrum which contains a broad-band power amplifier encompassing the carriers for amplifying an input signal into a more powerful output signal, wherein a measuring signal is formed from the out... | 02/07/2006 |
| 6996416 | Portable wireless communication terminal and control method A portable wireless communication terminal having a wireless communication function and a music recording and/or replaying function determines whether the wireless communication function is to be disable or not when an user selects the music recording/replaying func... | 02/07/2006 |
| 6996382 | Transmission output power control device for use in a burst transmitter and control method A burst transmitter is obtained which, when a constant envelope modulation is used, can control the envelope of a transmission output power by controlling a baseband signal without causing the spreading of the spectrum. A transmission output power control device inc... | 02/07/2006 |
| 6996379 | Linear high powered integrated circuit transmitter A linear high powered integrated circuit transmitter includes an up-conversion module, a plurality of power amplifiers, balanced integrated circuit coupling, and a combining circuit. The up-conversion module is operably coupled to produce a differential up-converted... | 02/07/2006 |
| 6996164 | Self-interference removal using converter compensation in a relayed communication system Self-interference cancellation in two-way relayed communications is improved by creating models of upconverter and downconverter imperfections and then compensating for those imperfections before self interference cancellation processing. The model includes compensa... | 02/07/2006 |
| 6996080 | Chip-synchronous CDMA multiplexer and method resulting in constant envelope signals A multiplexer and a method for chip-synchronous code-division multiple access (CDMA) signals produces a constant envelope signal. The output signal of the multiplexer permits use of a saturating (Class C) high power amplifier (HPA) resulting in a net increase in eff... | 02/07/2006 |
| 6993301 | Lineariser for a signal handling apparatus A lineariser (100) for reproducing distortion present in the output of an amplifier (110) (or other signal handling device) generates a predistortion signal from the amplifier input. The predistortion signal is mixed into the amplifier input signal usi... | 01/31/2006 |
| 6993299 | Efficiency of power amplifiers in devices using transmit beamforming Systems and methods for optimizing the efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for transmission by a corresponding one of a plurality of antennas. Using transmit beamforming, th... | 01/31/2006 |
| 6993091 | Correction of DC-offset of I/Q modulator A method and an arrangement for determining correction parameters used for correcting DC-offset of an I/Q modulator in a transmitter comprising an I/Q modulator and a corrector for correcting the DC-offset caused by the I/Q modulator are presented. The method compri... | 01/31/2006 |
| 6993090 | Distortion compensation apparatus and distortion compensation method A method and apparatus for compensating for a distortion component of a device such as a power amplifier can be achieved without requiring a demodulator. A voltage controlling a gain of the amplitude of the input signal based on the amplitude control signal generate... | 01/31/2006 |
| 6993087 | Switching mode power amplifier using PWM and PPM for bandpass signals Switching mode power amplifiers using pulse width modulation (PWM) and pulse position modulation (PPM) for generating bandpass signals is disclosed. Fully digital implemented transmitter structures having QPSK inputs for phase and amplitude are described. ... | 01/31/2006 |
| 6993066 | Transmitting apparatus and gain compensating method A code multiplexer multiplexes spread data output from a spreader to generate code-multiplexed data. A reference data generator generates redundant data with constant power and with no information contained therein. A data adder adds the redundant data to the code-m... | 01/31/2006 |
